As you can see from the output of "usbconfig", it is attaching as a ugen(4) device.. i.e: a generic catch-all device used for unrecognized/unsupported components.

So for now, this device may not be supported by FreeBSD.. it may however be supported by OpenBSD or NetBSD, or perhaps by loading a different kernel module (..someone else may be able to clarify, if one exists for your device).